[COOK-3862] Improving README in cookbook database

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-4009] Add PostgreSQL SCHEMA management capability

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to v1.6.0
Version bump to v1.6.1
[COOK-3441] Make user password optional

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 2.0.0
Publish 2.0.0 Changelog
Updating mysql cookbook dependency, enforcing the rubocops
Version bump to 2.1.0
Publish 2.1.0 Changelog
Version bump to 2.1.1 (for development)
depending on mysql-chef_gem
Version bump to 2.1.2
Publish 2.1.2 Changelog
[COOK-4529] Query action ignores MySQL errors

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 2.1.4
Publish 2.1.4 Changelog
Version bump to 2.1.5 (for development)
[COOK-4538] Bump supported Chef version

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 2.1.6